h i s s p e c i f i c a t i o n c o v e r s molded cups, 2 i n c h e s i n d i a m e t e r a n d under, compounded f r o m h i g h t e m p e r a t u r e r e s i s t a n t r u b b e r : f o r u s e i n h y d r a u l i c a c t u a t i n g c y l i - n d e r s emp1.oying h y d r a u l i c - b r a k e f l u i d o f n o n m í n e r a l - o i l t y p e .